OP on the main site of the Lodestone on the Benchmark update,

* The benchmark software for FFXIV: A Realm Reborn released in 2013 was designed to generate scores based primarily on frame rate. However, the new benchmark for FFXIV: Heavensward has been redesigned to generate scores based on your system's overall performance. We strongly recommend using the latest benchmark software to more accurately measure the performance of your PC.